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Mirrors > Home > ILE Home > Th. List > enrer | GIF version |
Description: The equivalence relation for signed reals is an equivalence relation. Proposition 9-4.1 of [Gleason] p. 126. (Contributed by NM, 3-Sep-1995.) (Revised by Mario Carneiro, 6-Jul-2015.) |
Ref | Expression |
---|---|
enrer | ⊢ ~R Er (P × P) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-enr 7776 | . 2 ⊢ ~R = {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ (P × P) ∧ 𝑦 ∈ (P × P)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = 〈𝑧, 𝑤〉 ∧ 𝑦 = 〈𝑣, 𝑢〉) ∧ (𝑧 +P 𝑢) = (𝑤 +P 𝑣)))} | |
2 | addcomprg 7628 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) = (𝑦 +P 𝑥)) | |
3 | addclpr 7587 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) ∈ P) | |
4 | addassprg 7629 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) +P 𝑧) = (𝑥 +P (𝑦 +P 𝑧))) | |
5 | addcanprg 7666 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) = (𝑥 +P 𝑧) → 𝑦 = 𝑧)) | |
6 | 1, 2, 3, 4, 5 | ecopoverg 6681 | 1 ⊢ ~R Er (P × P) |
Colors of variables: wff set class |
Syntax hints: × cxp 4653 Er wer 6575 Pcnp 7341 +P cpp 7343 ~R cer 7346 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4144 ax-sep 4147 ax-nul 4155 ax-pow 4203 ax-pr 4238 ax-un 4462 ax-setind 4565 ax-iinf 4616 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2986 df-csb 3081 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-nul 3447 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-int 3871 df-iun 3914 df-br 4030 df-opab 4091 df-mpt 4092 df-tr 4128 df-eprel 4318 df-id 4322 df-po 4325 df-iso 4326 df-iord 4395 df-on 4397 df-suc 4400 df-iom 4619 df-xp 4661 df-rel 4662 df-cnv 4663 df-co 4664 df-dm 4665 df-rn 4666 df-res 4667 df-ima 4668 df-iota 5207 df-fun 5248 df-fn 5249 df-f 5250 df-f1 5251 df-fo 5252 df-f1o 5253 df-fv 5254 df-ov 5913 df-oprab 5914 df-mpo 5915 df-1st 6184 df-2nd 6185 df-recs 6349 df-irdg 6414 df-1o 6460 df-2o 6461 df-oadd 6464 df-omul 6465 df-er 6578 df-ec 6580 df-qs 6584 df-ni 7354 df-pli 7355 df-mi 7356 df-lti 7357 df-plpq 7394 df-mpq 7395 df-enq 7397 df-nqqs 7398 df-plqqs 7399 df-mqqs 7400 df-1nqqs 7401 df-rq 7402 df-ltnqqs 7403 df-enq0 7474 df-nq0 7475 df-0nq0 7476 df-plq0 7477 df-mq0 7478 df-inp 7516 df-iplp 7518 df-enr 7776 |
This theorem is referenced by: enreceq 7786 prsrlem1 7792 addsrmo 7793 mulsrmo 7794 ltsrprg 7797 gt0srpr 7798 0nsr 7799 axcnex 7909 |
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